>>> i accept your nomination for president of the united states. >> president obama makes his case for four more years saying, quote, i never said this journey would be easy and i won't promise that now. >> good morning. i'm sarah simmons. >> i'm wisdom martin. time now to look at the weather. >> gwen tolbart is in for tucker barnes this morning. >> i know this is wisdom's favorite day. he was saying friday eve yesterday. >> that's right. >> he is excited. >> closing it out. >> we'll close it out pretty good because we've got sunshine for you today. expected to be a dry day and it will be a hot one know. satellite-radar composite showing you not a whole lot going on right now. we have a few clouds and fog well to the west but other than that, things are looking really good out there. yesterday's highs, 84 degrees at reagan national airport. 86 at dulles and 85 at bwi thurgood marshall. 72 at d.c. 69 at baltimore. so another hot day. 90degrees is where we're headed. a southerly wind flow from five to 10 miles per hour. we'll have no shortage of sunshine today so looking good. i'll have